package railo.transformer.bytecode.op;
import org.objectweb.asm.Label;
import org.objectweb.asm.Opcodes;
import org.objectweb.asm.Type;
import org.objectweb.asm.commons.GeneratorAdapter;
import railo.runtime.exp.TemplateException;
import railo.transformer.bytecode.BytecodeContext;
import railo.transformer.bytecode.BytecodeException;
import railo.transformer.bytecode.Literal;
import railo.transformer.bytecode.Position;
import railo.transformer.bytecode.cast.CastBoolean;
import railo.transformer.bytecode.expression.ExprBoolean;
import railo.transformer.bytecode.expression.Expression;
import railo.transformer.bytecode.expression.ExpressionBase;
import railo.transformer.bytecode.literal.LitBoolean;
import railo.transformer.bytecode.util.Methods;
import railo.transformer.bytecode.util.Types;
public final class OpNegate extends ExpressionBase implements ExprBoolean {
private ExprBoolean expr;
private OpNegate(Expression expr, Position start, Position end) {
super(start,end);
this.expr=CastBoolean.toExprBoolean(expr);
}
/**
* Create a String expression from a Expression
* @param left
* @param right
*
* @return String expression
* @throws TemplateException
*/
public static ExprBoolean toExprBoolean(Expression expr, Position start, Position end) {
if(expr instanceof Literal) {
Boolean b=((Literal) expr).getBoolean(null);
if(b!=null) {
return new LitBoolean(!b.booleanValue(),start,end);
}
}
return new OpNegate(expr,start,end);
}
/**
*
* @see railo.transformer.bytecode.expression.ExpressionBase#_writeOut(org.objectweb.asm.commons.GeneratorAdapter, int)
*/
public Type _writeOut(BytecodeContext bc, int mode) throws BytecodeException {
GeneratorAdapter adapter = bc.getAdapter();
if(mode==MODE_REF) {
_writeOut(bc,MODE_VALUE);
adapter.invokeStatic(Types.CASTER,Methods.METHOD_TO_BOOLEAN_FROM_BOOLEAN);
return Types.BOOLEAN;
}
Label l1 = new Label();
Label l2 = new Label();
expr.writeOut(bc, MODE_VALUE);
adapter.ifZCmp(Opcodes.IFEQ,l1);
adapter.visitInsn(Opcodes.ICONST_0);
adapter.visitJumpInsn(Opcodes.GOTO, l2);
adapter.visitLabel(l1);
adapter.visitInsn(Opcodes.ICONST_1);
adapter.visitLabel(l2);
return Types.BOOLEAN_VALUE;
}
/*public int getType() {
return Types._BOOLEAN;
}*/
}